Camera mechanism



Jan. 26, 1943. 0. K. CAZIN CAMERA MECHANISMS Filed March 26, 1940 5 Sheets-Sheet l FIGJ.

P Q D D D D Q Q Q INVENTOR WI A ATTORNEY Jan. 26, 1943. o. K. CAZIN 2,309,382

CAMERA MECHANISMS Filed March 26, 19.40 5 Sheets-Sheet 2- INVENTOR.

' ATTORNEY.

lllll llllllll FIG.3.

iiiiii lummiiiiifl \lllllllllllrlllumpuqllnmnummnm Jan. 26, 1943.

F'lcasi 0. K. CAZIN CAMERA IVIECHANISMS Filed March 26, 1940 5 Sheets-Sheet 5 INVENTOR.

ATTORNEY.

Jan. 26, 1943. 0. K. CAZIN CAMAERA MECHANISMS Filed March 26, 1940 5 Sheets-Sheet 4 INVENTOR.

n-12g 0.- K. CAZIN 2,309,382

CAMERA MECHANISMS 5 Sheets-Sheet 5 Filed March 26, 1940 1 2* i x 55 3: t H F I u I g:

INVENTOR. may 6 J; ATTORNEY.

operations,

means in accordance with-its angular position,

. transporting the -'leader" m t and Patented Jan 26, 1943 UNITED STATES PATENT OFFICE CAMERA MECHANISM Otto K. Cazin, Hoboien,

N. J., assiglior to Universal Camera Corporation, New York, N. 1., a

corporation or New Yo Application Mar-ch26, 1940, Serial No. 326,073

11 Claims. (Cl. 95-31) and also to prevent actuation of the shutter trip button before the winding shaft is turned to advance the film to the next frame, the locking member being coupled to and controlled by the shutter tripping mechanism.

A. further important feature of the present invention resides in an arrangement permitting uninterrupted winding of the'iilm for the initial leader portion thereof as well as the trailer portion. This arrangement is correlated with the shutter trip locking meansreferred to and renders the latter ineffective during winding of the "leader" and trailer portions of the'fllm. In the preferred embodiment, a cam is intermittently advanced in accordance with thefilm winding and suitably actuates the locking such control can being coupled to the film exposure counter, the assembly thereby being compact and foolproof in operation.

It is accordingly an object of thepresent invention to provide a novel arrang m nt f r pr venting tripping of the shutter until a fully unexposed'film frame is in position for exposure.

Another object of the present invention'is to provide a novel arrangement for preventing advancement of the film until the shutter is actuated for exposing a film frame.

Still another object of the invention is to provide a novel interlocking arrangement actuated by the shutter mechanism to control the operation of the shutter trip button and film winding mechanism.

tions to permit uninterrupted winding of the film for these portions thereof. a

These and further objects of the present inven tion will become more evident in the following description taken in connection with the drawings, in which: Figure 1 is a top view of a camera embodying the principles and mechanism of the present invention.

Figure 2 is an inside view oi. the camera, with the back cover removed.

Figure 3 is a horizcntalcross sectional view through the camera, taken along the line 3-3 of Figure 2, showing the shutter tripping and film transport mechanisms.

Figures 4 and 5 are views corresponding to Fig ure 3, illustrating different positions of the shutter control Figures 6 to.13 are enlarged fragmentary views, in section, illustrating the relation of the coacting parts for different positions of the shutter trip button.

Figure 14 is an enlarged fragmentary view, in section, of the indicating dial and as oc operating mechanism, as taken along the 1 1 "-44 of Figure 2.

Figures 15 and 16 are respectively bottomand end views of the mechanism of Figure 14.

Figure 1'7 is a fragmentary view corresponding to Figure 14, in a different operating positio General description of the camera jective 29. The shutter setting means, and other further-object of. the present invention is to provide a novel arrangement for uninterruptedly of the film while permitting successive individual frame exposures in the intermediate film section.

"Still a further object of the present invention is to provide a novel arrangement for rendering the film winding locking-means ineifective dur- "trailer". film winding operaand "trailer portions I accessories such as a range and view finder are not shown in the drawings, since they do not form part of the present invention. 3

The film transport mechanism is shown in Figure 2. This mechanism comprises a winding lrnob 1 2i usedto wind film F from take-oi! spool ill onto take-up spool 3|. Winding knob 2! is fastened to winding shaft 32 carrying film sprockets 33. which engage edge perforations 34 of film. Takeup spoo1 3| is rotatably supported between bearing 31 carrying pin .3. of the spool,v and fixed conical pin 38 coacting with a socket in post I! extending from spool Ii.

A gear 4'0, secured on winding shaft 32, drives idler pinion 4| meshing with gear 62 mounted on spool post 35. when winding knob 2' is rotated,

sprockets 33, 33 advance film F onto take-up spool 3|, and take-up spool 3|, driven by gear train 40, H, 42, holds the wound film taut, through a friction drive of the character disclosed in copending applications, Serial Nos. 204,102 and 204,103, filed April 25, 1938, in the name of Kende and Brownscombe.

The shutter mechanism of the camera. is incorporated in the objective lens structure 29 generally indicated at 63. The construction of the shutter may be of the character disclosed in copending application Serial No. 301,720, filed October 28, 1939 in the name of Kende and Cazin. The shutter at 63 is operated by the rotation of shaft 6?. connected therewith in response to a downward actuation of trip button 24. A carriage plate 43 and a rocking lever guide 44 are coupled with trip button 24. Pin 46 on arm 41 of rocking lever 41, 48 engages slot 48 in guide 44. When trip button 24 is depressed, guide 44 moves downwardly, causing rocking lever 41, 43 to rotate in a clockwise direction. Lever 47, 48 is mounted on rod 50. Lever arm 48 is provided with a pin engaging lug 52 on shutter bar 53. Shutter bar 53 is mounted on pin 54 of shutter drive segment gear 56, which is in turn rotatably mounted on pin 51. Pin 51 is secured with shutter drive plate 58, supporting a spring 59 fastened to lug 83 of shutter bar 53. Spring 59 mechanically biases shutter 53 towards the left.

When trip button 24 is pressed downwards, lever 41, 48 is rotated clockwise, and shutter bar 53 is pulled to the right against the action of spring 58. Shutter drive segment gear 56 motivates shutter segment gear Si in right angular relation, causing gear 61 to rotate clockwise. Gear Si is secured to shutter operating shaft 62. Detai s of the shutter mechanism are not illustrated since optional arrangements may be employed. The shutter may be incorporated in the casing indicated at 63, or elsewhere within the camera, as will be understood by those skilled in the art.

The shutter mechanism may be operated for instantaneous, bulb or time exposures, as is well known in the art. When the shutter mechanism is adjusted for instantaneous exposure, the shutter thereof wilfl be fully tripped when shutter gear 61 has completed its clockwise angular rotation in response to the depression of the trip button 24.' Shutter gear 5| will thereupon be enabled to return to its original position due to the biasing action of spring 59 when trip button 24 is released. When the shutter is arranged for bulb exposure, the shutter will remain open when trip button 24 is pressed downwards. The shutter will not again close until it is permitted to do so by the release of the trip button 24.

When arranged for time exposure, the shutter remains open when trip button 24 is pressed down fully. However, the release of trip button 24 will allow the shutter gear ii to return only partially due to the action of the shutter mechanism during the time exposure. Shutter gear BI and .the other coacting parts of the shutter tripping mechanism will return to their original position only upon a second downward actuation of trip button 24 as will be understood by those skilled in the art.

Double exposure prevention An important feature of the present invention plished with a locking member actuated in conjunction with the shutter mechanism. The member is normally interlocked with the winding shaft preventing that shaft from rotating. When the trip button is depressed to operate the shutter mechanism, the locking member is thereby actuated to prevent the trip button from reoperating and simultaneously unlocks the winding shafts. When the exposed fllm section is removed, and the new film section is wound in position, the locking member thereupon relocks the winding shaft and permits the trip button to again operate. Referring now particularly to Figures 2 and 3, the locking element referred to is member 61 which is herein termed the locking bar.

When trip button 24 is pressed downwardly, shutter bar 53 is thereupon pulled to the right. When the bar 53 has traversed about half of its excursion, lug 64 of shutter bar 53 engages projection of locking bar 61. Shutter bar 53 thus carries locking bar 61 along for the remainder of its excursion. This movement of locking bar 61, to the right in Figure 3, is opposed by spring 58 mounted between lug 69 of locking bar 61 and post Ill. As locking bar 61 travels to the right by the intermediary of shutter bar 53, lug 1| of locking bar 51, moves out of engagement with notch I2 on looking cam 13. Locking cam 13 is secured to film winding shaft 32.

As lug H clearsv notch 12 of locking cam 13,

spring 14, attached to post 10 and to lug 16 of locking bar 61, pulls locking bar 61 toward post 10 substantially in the inclined direction of arrow a, to the position thereof shown in Figure 4. Locking bar 61 is provided with an aperture 15 adjacent spring post 10, which permits transverse movement of locking bar 61, i. e. to the right or left. Figure 4 shows the position of locking bar 61 after trip button 24 has been released and permitted to return. Due to biasing spring 14, lug H of locking bar 61 does not reengage with notch 12 of locking cam 13, but instead rests against the periphery of cam 13 to the right of its engaged position. In this position of bar 61, right hand projection 19 thereof interferes with the downward travel of trip catch mounted on trip button 24, preventing the latter from being pressed down.

When winding knob 26 has been turned through a complete revolution, thereby advancing the film one frame, lug H of locking bar 41 again falls into notch I2 in looking cam. 13. This action, while pulling locking bar 61 forward, 1. e. substantially opposite to the direction of arrow a and away from spring post 10, permits locking bar 51 to travel laterally toward spring post II. This combined movement of locking ba 61, exercised under the influence of springs 68 and 14. moves the extreme right hand projection I5 of locking bar 51 from under trip catch 80. The trip button 24 assembly is thereupon in condition to be pressed downwardly for exposure of the frame in position.

The action of trip catch 30 is shown in greater detail in Figures 6 to 13 corresponding to the different positions of trip button 24. Trip catch 83 is rotatably mounted on shaft ll of button carriage plate 43. Spring 32 pressing against carriage plate 43 tends to prevent rotation of trip catch 80 in a counterclockwise sense. These figures are in pairs, showing respective side and end views of the mechanism.

views thereof, on an enlarged scale.

In Figures 6 and 7 the relative position of trip catch 80 with looking bar projection I9 corresponds to the position of locking bar 61, shown in Figures 2 and 3. Here trip button 24 is in position to be tripped. Trip catch 80 is thus free to move clear of locking bar projection I9 when trip button 24 is depressed.

In Figures 8 and 9 the relative position of trip catch 80 and locking bar end 19 shown, corresponds to when trip button 24 is pressed all the way down as indicated by the arrow. Projection I9 here corresponds to' its position 'in Figure 4, abutting trip catch 80. 1

Figures 10 and 11 show the relative position of trip catch 80 and locking bar end '19 during the upward traverse of trip buttonv 20. Trip catch 80 here rotates against the action of spring 82 through a counterclockwise angle, and slips past locking bar end 79 as indicated by arrows b, b. After looking bar projection I9 has passed trip catch 80, the latter returns to its original position as shown in Figures 12, 13.

Figures 12 and 13 show the interference between trip catch 80 and locking bar end 19 when an attempt is made to trip'shutter 63, by depressing button 24 before the film has been advanced another frame. Double exposure of a frame is thus effectively prevented.

As shown in Figures 2 and 3, the position of locking bar I9 is such as to permit tripping of shutter 63. At the same time, lug II of locking bar 61 engages notch 12 of locking cam -I3 on winding shaft 32. and cutout section 18 of locking bar 6'! is held against spring post I0. Thus. winding shaft 32 is prevented from turning and there can be no film transport before shutter 63 has been tripped by trip button 24.

Uninterrupted film transport A further important feature of the present invention resides in the novel arrangement for winding the film uninterruptedly during the initial leader portion thereof as well as the finalv trailer portion after the film exposure. The intermediate section of the film is exposed one at a time in a manner hereinabove described in connection with the trip button and shutter operations. A cam is provided in cooperative relationship with the film winding shaft and is motivated in accordance with the film exposures made.

When the predetermined number of film exposures have been taken, the cam coactswith the locking barfl61 hereinabove described and moves the locking bar into disengagement with the film winding shaft and into engagement with the trip button to prevent its actuation during this interval. The winding shaft isthereupon permitted to be rotated'without interruption until the film is fully wound onto the takeup spool 3|. The film winding shaft is held in this condition during the reinsertion of a new roll of film and the leader portion of the film is wound on the take-up spool 3| in a manner to be described in more detail hereinafter. The locking bar 61 is returned to its normal operation condition when the "leader portion of the film has been transported, and'the first frame is in position for exposure.

Before describing the details of the uninterrupted film transport arrangement, the exposure Figure 17 is a view similar. to Figure 14 showing a different operating position of the indicator dial and associa-ted parts.

Gear 40 on film winding shaft 32 coacts with a pawl 84, which serves to prevent the turning of winding shaft 32 in a reverse direction. Pawl 84 is. pivoted on post 86 and pressed against gear 40 by spring 81 fastened on projection 88 of mechanism plate 93. when rotated in its proper clockwise direction, the teeth of winding shaft gear 40 move past pawl 84. If an attempt is made to turn winding shaft 32 in a counterclockwise direction, the teeth of gear 40 engage with pawl 84 to prevent reverse winding thereof.

The winding shaft locking cam 13, which is cylindrical except for notchv 12 (Figures 3 tab), has an adjacent semi-circular cam section 85. Semi-circular cam 85 operates exposure counter 21 in a manner to be described. A lever 89 is loosely mounted on indicator shaft 39. A spring 90 is fastened between projection 9I of lever 89 and on lug 92 of the mechanism plate 93. Indicating lever 89 is thus spring biased towards winding shaft 32. Spring 90 thus insures a positive contact between indicating lever 89 and either winding shaft 32 or the surface of semicircular cam 85 (Figure 14). Indicator lever .89 is provided with pin 94 for supporting a pawl 96. A spring 91, fastened between lug .98 of indicating lever 89 and ear 99 of pawl 96, presses pawl 96 against a ratchet I00 fixed on indicator a shaft 39.

Figure 17 illustrates the action of indicating lever 89 during the advancement of a frame.

As winding shaft 32 is turned by winding knob' 26, indicator lever 89 rideson semi-circular cam. 85, and pivots about indicator shaft 39 counterclockwise. as shown by arrow 0. Ratchet I00 is engaged by pawl 96 which is turned counterclockwise at an angle equal to that executed by indicator lever 89. When the film has advanced one frame, indicator lever 89 is returned to its original position with its upstanding edge contacting the winding shaft 32 by the action of spring 90, as shown in Figure 14.

As indicator ratchet I00 is turned, it advances one tooth over pawl I 0| mounted on shaft I02 of mechanism plate 93. Pawl II" is tensioned by spring I03 fastened between lug I04 of plate 93 and hole I 05 in pawl I M. Upon the return of indicator lever 89 to its original position, pawl I 0| prevents ratchet I00 from turning. In this manner, ratchet I00 advances tooth by tooth corresponding to the film advance, frame by frame by winding knob 26.

Ratchet I00, shaft 39 and indicatordial 2! rotate as a single unit. Indicator dial 2'! is graduated in such manner, that the advance of one tooth of ratchet I00 will move dial 2! by one graduation opposite the index. When the film roll is first inserted into the camera, dial 21 is manually set to indicate the beginning or leader portion of the film roll. After winding shaft 32 has been turned uninterruptedly a snflicient number of times to advance the film forthe firstframe exposure, dial 21 will have advanced the proper angle to indicate frame N0. 1. Each successive frame advance is thereupon indicated on the scale of indicator 21.

counter and its associated mechanism will be first explained, reference being had particularly 'When all frames have bcenexposed, indicator dial 2'! will have advanced to indicate trailer,"

i. e. the end portion of the film roll, which is not intended to be exposed.

To permit uninterrupted film transport, a cam I06 is arranged to coact with looking bar 61. Cam I06 is secured on indicator shaft 39. The coaction of cam I06 with projecting lug I01 of the locking bar is evident in elevational F18- ures 3, 4 and 5. In Figure 3, the position of cam I06 with respect to projection I01 of locking bar '61 corresponds to theoperation of the camera for successive frame advancing and exposure, locking bar 61 being permitted to move to its extreme left position under the action of biasing spring 68.

Upon successive advancement and exposure of the film frames, indicator shaft 39 is rotated step by step through the pawl and ratchet I-IOI arrangement described, with c0rresponding indications by exposure indicator 21. When all the frames have been properly advanced and exposed, indicator shaft 39 will have been rotated counterclockwise until the projecting portion of cam I08 coacts with projecting lug I01 of locking bar 61. Figure shows such coaction of cam I08 and lug I01, whereupon locking bar 61 is moved towards the right and held in that position.

Locking bar 61 is thus arrested orlocked in the position illustrated in Figure 5, to the right, disengaging projecting lug 1I thereof from slot 12 of winding shaft cam 13. In this position, extreme right projection I9 of locking bar 01 moves beneath trip catch 80 and prevents the trip button 24 from actuating the shutter mechanism. Trip button 24 is thereupon locked in its upper position, and winding shaft 32 is free to be rotated to wind up film F upon pick-up spool 3I. The uninterrupted film transport is feasible in view of the prevention of engagement between cam 13 and projection H of looking bar 51.

As winding shaft 32 is rotated through winding knob 26, semi-circu1ar cam 00 is correspondingly rotated to actuate lever 80 and advance the indicator shaft 39 step-by-step through pawl and ratchet I00, IN. The trailer section of the film is uninterruptedly wound upon spool 34, and cam I05 is advanced about one-fourth revolution in the illustrated embodiment, for the trailer section, which is indicated correspondingly by indicator 21.

Looking bar 61 remains locked in position, to the right, by cam I08 until a fresh roll of film is inserted in the camera, the indicator dial is manually set to starting point, if the same is not clearly at such point, and'the "leader" portion thereof is uninterruptedly wound onto the take-up spool at 3|. Cam I06 is further rotated counterclockwise by indicator shaft 00, and indicator 21 shows up leader." when the leader portion is fully wound up in an uninterrupted manner, the raised surface portion of cam I06 is advanced sufficiently to permit looking bar 61 to be biased towards the left by spring ilmagainst the inner surface portion I06a of cam The design of cam I00 and the coacting advancing mechanism for indicator shafts 30 and indicator 21 corresponds to the film used, in order that when the first film frame is in position for exposure, locking bar 01 will be biased to the left by spring 08 and engage notch 12 of cam 13 to lock the winding shaft and also disengage-trip catch 00 to permit the shutter tripping mechanism to be actuated through trip button 24. The operation of the camera as. to exposure and film advancement corresponds to that hereinabove described wherein an unexposed frame cannot be advanced until the shutter mechanism is actuated through trip button 24, as well as the prevention of double exposure of the film before advancement thereof to the next frame.

It is obvious that various changes and modifications may be made to the details of construction of the disclosed camera embodiment without departing from the broader spirit and scope of the invention as set forth in the following claims.

What I claim is:

1. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button, and an element pivoted on said button actuable for depression and return for displacement during the return movement of the button; and apparatus actuated by said shutter operating mechanism comprising a portion moved into the path of said element after said trip button is depressed, said element being arranged to be turned on its pivot out of said path, to permit said trip button to be restored to initial position and to then return and abut said portion to render said trip button inoperative for reactuation until said film winding member is operated to advance the film to the next frame.

2. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button actuable for depression and return, and an element pivoted on said button, for displacement during the return movement of the button; and apparatus actuated by said shutter operating mechanism for locking said film 'winding member from advancing the film untiLsaid trip button is actuated to expose the positioned film frame comprising a reciprocable locking bar coupled with said shutter operating mechanism and having an integral portion movable into the path of said element after said trip button is depressed, said element being arranged to be turned on its pivot around said portion out of said path, to permit said trip button to be restored to initial position and to then return and abut said portion to lock it In an inoperative condition.

3. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return and an element pivoted on said button actuable for displacement during the return movement of the button: and apparatus actuated by said shutter operating mechanism for rendering said tripbutton inoperative for reactuation until said film winding member is operated to advance the film to the next frame comprising a longitudinally reciprocable locking bar having a portion moved into the path of said element after said trip button is depressed, said element being arranged to be contacted by said portion and turned on its pivot out Of said path, to permit said trip button to be restored to initial position and to then return and abut said portion to lock it in the inoperative condition, and a locking cam connected with said film winding member, a section of said locking bar being engageable with said locking cam for arresting the operation of said film winding member.

an element depending from said trip button and mounted for displacement on the'return movement thereof; and apparatus actuated by said.

- tioned film frame and for rendering said tripbutton inoperative for reactuation until said film winding member is operated to advance the film to the next frame comprising a longitudinally reciprocable locking bar coupledwith said shutter operating mechanism and having a portion successively engageable with said trip button element for displacing the same and permitting said trip button to be restored to initial position after actuation and to then lock it in the inoperative condition.

5. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return, and an element depending from said trip button and mounted for displacement on the return move.- ment thereof; and apparatus actuated by said shutter operating mechanism for locking said film winding member from advancing the film until said trip button is actuated to expose the positioned film frame and for rendering said trip button inoperative for reactuation until said film winding member is operated to advance the film to the next frame comprising a longitudinally reciprocable locking bar coupled with said shutter operating mechanism and having a portion successively engageable with said trip button ele,- ment for displacing the same and permitting, said trip button to be restored to initial position after actuation and to then look it in the inoperative condition, and a locking cam connected with said film winding member, a section of said locking bar being engageable with saidlocking cam for arresting the operation of said film winding member alternately with the engagement of the barportion with said trip button element.

6. In a camera having a shutter and a winding member for advancing the .film mechanism for operating said shutter including a linearly movable trip button for depression and return, an element depending from said trip button and pivoted thereon for displacement during the return movement of said button; and apparatus actuated by said shutter operating mechanism for locking said film winding member from advancing thefilm until said trip button is actuated to expose the positioned film frame and for rendering said trip button inoperative'for 're-K tus actuated by said shutter operating mechaactuation until said film winding member is operated to advance the film to the next frame compri perpendicular to the pivoting plane of said element and directly coupled with said shutter operating mechanism, said bar having an extending portion successively engageable with said trip button element, said element being arranged g a locking bar reciprocable in a path' S nism for locking said film winding member from advancing the film until said trip button is actuated to expose the positioned film frame and for rendering said trip button inoperative for reactuation until said film winding member is operated to advance the fihn to the next frame comprising a longitudinally reciprocable locking bar coupled with said shutter operating mechanism and having a portion successively engageable-with said trip button element, said elementbeing arranged to be turned around said portion out of its path, to permit said trip button to be restored to initial position and to then abut said portion to lock said button in the inoperative condition; a locking cam connected with said.

film winding member, a section'of said locking bar being engageable with said locking cam for arresting the operation of said film winding member alternately with the locking engagement of the bar portion with said trip button element;

and means for holding said bar section in engagement with said cam and said bar portion out of engagement with said trip button element until said trip button is actuated to operate said shutter mechanism and for holding said bar portion in looking engagementwith said trip but-v ton and said bar section out of engagement with said cam until said film winding mechanism is operated to advance the film to the next frame.

to be turned around said portion out of said path,

to permit said trip button to be restored to initial position and to then abut said portion to lock it in the inoperative condition.

7. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return, "an element depending from said trip button and pivoted on said button and mounted for displacement on the return movement thereof appara- 8. In acamera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return, and an element depending from said trip button and mounted for displacement on the return movement thereof; and apparatus actuated by said shutter operating mechanism for locking said film winding member from advancing the film until said trip button is actuated to expose the positioned film frame and for rendering said trip button inoperative for reactuation until said film winding member is operated to advance the film to the next frame, comprising a longitudinally reciprocable locking bar coupled with said shutter operating mechanism, said bar having an integral portion successively engageable with said trip button element for permitting said trip button to be restored to initial position after actuation and to then lock said button in the inoperative condition, a locking cam secured to said film winding member, asection of said. locking bar being engageable with; a notch in said locking cam when said bar is reciprocated in" the direction away from said element for arresting the operation of saidfilm winding member alterwith said trip button element,,and means for normally holding said bar section in engagement with said cam notch and said bar portion out of engagement with said tri button element until said trip button is actuated to operate said shutter mechanism and for holding said bar portion in looking engagement withsaid trip button and said her section but of engagement with said cam notch until said .film'winding mechanism is operated to advance the film to the next frame including spring means for normally biasing said bar section in a direction against said cam and at a transverse angle with respect to the cam surface. 9. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return; apparatus-for normally locking said film winding button is actuated to expose the positioned film frame, comprising a longitudinally reciprocable locking bar coupled with the shutter operating mechanism, said locking bar having a portion normally engageable with said film winding member and having another portion alternately engageable with said tripbutton for holding it from operative movement; and means actuated by said film winding member for rendering the locking of said member ineffective during a predetermined section 01 the film to permit uninterrupted film transport of the film section, comprising a transport cam, and a device coupling said transport cam with saidwinding member for advancing said transport cam step-by-step with the film transport, said transport cam being arranged to move said locking bar out of engagement with said film winding member and into engagement with said trip button until said predetermined film section is iully transported.

10. In a camera having a shutter and a winding member for advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return: apparatus for rendering said trip button inoperative for reactuation until said film winding member is operated to advance the film to the next frame, comprising a locking bar coupled with said shutter operating mechanism; a looking camconnected with said film winding member, a section of said longitudinally reciprocable locking bar being engageable with said locking cam for arresting the operation of said film winding member; and means actuated by said film winding member for rendering the locking -of said member ineffective during a predetermined section of the film to permit uninterrupted film transport of the film section and for locking said trip button against actuation during the transport of said film section comprising a transport cam, and a device coupling said transport cam step-by-step with the film transport, said member from advancing the film until said trip transport cam being arranged to move said locking bar out 0! engagement with said locking cam and into engagement with said trip button element until said predetermined film section is fully transported.

11. In a camera having a shutter and a winding member ior advancing the film; mechanism for operating said shutter including a linearly movable trip button for depression and return, and an element pivoted on said button for displacement during the return movement of the button; apparatus for rendering said trip button inoperative tor reactuation until said film winding member is operated to advance the film to the next frame, comprising a longitudinally reciprocable locking bar coupled with said shutter operating mechanism, and having a portion moved into the path of said element after said trip button is depressed, said element being arranged to be turned on its pivot out of said path, to permit said trip button to be restored to initial position and to then abut said portion to lock it in the inoperative condition; a locking cam connected with said film winding member, a section 0! said locking bar being engageable with said locking cam for arresting the operation of said film winding member; and means actuated by said film winding member for rendering the locking of said member ineffective during a predetermined section 01 the film to permit uninterrupted film transport of the film section and for locking said trip button against actuation during the transport of said film section comprising a transport cam, and a device coupling said transport cam with said winding member for advancing said transport cam step-by-step with the film transport, said transport cam being arranged to move said lockingobar out of engagement with said locking cam and into engagement with said trip button element until said predetermined film section is fully transported. 

